Charles wood



(No Model.)

C. WOOD. VALVE GEAR FOR GAS 0B. OIL ENGINES.

No..594,146. Patented Nov. 23, 1897'.

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NrTED STATES ATENi` EEicE.

cHAELEswooD, or LONDON, ENGLAND.

VALVE-GEAR FOR GAS OIR OIL ENGINES.

SPECIFICATION forming part of Letters Patent No. 594,146, dated November23, 1897.

Application med December so, 189e. serial No. 617,476. (No man.)

T all whom it may concern,.-

Be it knownthat I, CHARLES IVOOD, engineer, a citizen of Great Britain,residing at 22 Bridgewater Square, London, E. C., in the Kingdom ofEngland, have invented certain new and useful Improvements in Valve-Gearfor Gas or Oil Engines, of which the following is a specification.

My invention relates to valve-gear for gas and oil engines; and myobject is to produce a very simple valve-gear with the minimum number ofoperating parts.

My invention consists in a method of actuating the air-inlet, gas-inlet,and exhaust valves from the motion of one crank-pin or eccentric, themotion for the valves being taken by a lever from a cam on a linkoperated by the said crank-pin or eccentric.

Referring to the accompanying sheet of drawings, which illustrates onemethod of carrying my invention into eifect, Figure l is a longitudinalelevation part section of an engine tted with my valve-gear. Fig. 2 is atransverse section on the line X Y, Fig. l; and Fig. 3 is a plan.

In carrying my invention into effect according to one modification Iarrange upon the crank-shaft A a pinion B, which gears into a spur-wheelC of double the number of teeth. In the face of this spur-wheel Iprovide a crank-pin D, and I connect the crank-pin to a lever E,operating the wayshaft F, by means of a connecting link or rod G. Theway-shaft carries at the other end a second lever II, which leveractuates an exhaustvalve I of the usual lift type, which valve isbrought to its seat by means of a spring of usual arrangement. The endof the link G, connecting the crank-pin D and the way-shaft lever E,oscillates in an arc to and fro. At a distance from the point ofjunction to the l Way-shaft lever on the said, link I place a'suitablecam-surface J. This cam-surface moves in an irregular ellipse, and onone stroke the cam wipes a roller K, attached to another lever L, whichlever operates the air-inlet valve M and also the gas-inlet valve N. Thegasinlet valve is actuated from the said second lever L by a knife-edgeO, controlled by an inertia-governor P, and the air-inlet valve isoperated from the said lever by means of a screw-adjusted pin Q. Thisparticular combination enables the one motion obtained from thecrank-pin'in the two-to-one spurwheel C to accomplish both the openingof the exhaust-valve I and the actuating of the gas and air valves M andN, respectively. The motion for the gas and air valves is more or lessat right angles to the motion actuating the exhaust-valve, and the camJ, which lifts the valves on one stroke, misses the roller K on thereturn stroke, because the cam position falls below on the returnmovement. By this device I am enabled to oper ate an engine very simplywithout any compleXities in the gear. Y

I do not confine myself to the use of a Wayshaft for the exhaust-valve,but may so arrange my engine as to combine all the valves on one side ofthe engine close to each other.

My invention is intended for application to Otto cycle gas and oilengines, and the engine I have described is an Otto cycle-engine, inwhich a is the crank, b the connecting-rod, and c the piston, while d isthe fly-wheel. These part-s donot require special description, as theOtto cycle is thoroughly well known.

I-Iaving now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

In a valve-gear for Otto cycle gas'or oil engines, the combination ofthe exhaustvalve, a lever and rod for operating the valve, an eccentricor crank running at half the speed of the engine for operating vthelever and rod, the air-valve, the gas-valve and the governor, and asingle lever for operating thev Vsaid air-valve, gas-valve and governorand a cam on the eccentric link or rod for operating the single lever,substantially as described. v

In witness whereof I have hereunto set my hand in presence of twowitnesses.

CHARLES WOOD. Witnesses:

WILLIAM EDWARDv EVANS, ALBERT EDWARD PARKER.

